Debugging joomla 1.5 backend component

I got an installable backend MVC component for Joomla
whichs base functions use jquery. It is almost working. But I can´t get it work properly on joomla 1.5. The component empowers to browse on the local filesystem and upload selected files.(...)
( on upload images can be resized on client-side automatically... )

requirements:
- installed joomla 1.5(.26)

To solve the problems you need to know PHP and JQuery and it´s relation and maybe there´s a conflict with mootools or any other javascripts...
> The component structure and logic is already there.
( attachment zipped file )

( There´s another version of the component for joomla 2.5 which works properly... )